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In order to improve the spectrum utilization while providing a fairness guarantee between users under the dynamic spectrum resources, the optimization problem for the scheduler of OFDM system with an unlimited queue capacity in cognitive radio networks (CRN) is first formulated. Then, under the constraints of the optimization problem, the Genetic Algorithm for Cognitive Radio Scheduler (GACRS) is...
The increasing demand on multi-media services with very different QoS requirements and the employment of new wireless network protocols like 802.11 and 802.16, underscore the need for a network capable of supporting multi-services. Based on the LWDF (Largest Weighted Delay First) algorithm, DS-LWDF (Differentiated Service-LWDF) algorithm is proposed to realize the scheduling among RT (Real Time) and...
A novel cross-layer scheduling algorithm with guaranteed QoS is proposed in CRN. A distinct scheduling priority integrating UCSI, QSI and QoS requirements is first proposed for CUs. Base on these scheduling priorities and specific scheduling mechanism, packet scheduling and channel allocation are jointly designed. The simulation results reveal that the proposed algorithm suffers a limited decline...
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